Oh Wow #A (Auckland) Mystery Cache

A series of caches based around a common feature. Find the first six and you may go for a bonus seventh. Each of the first six has a number on the underside of the lid, you will need this number to find the seventh.

The cache is not at the listed coordinates, the degrees and minutes are correct, but the decimal minutes are listed below.

The gates to this park have listed closing times, but in practice seem to only be open when the business located in the park is open. I strongly recommend parking in the street and walking the extra 50m.

Cache is a 1.2l sistema

You can check your answers for this puzzle on Geochecker.com.